We are going to use the Raspberry Pi GPIO Python library to send the control messages to Raspberry Pi GPIO ports. Here is the schematic for the raspberry Pi connections to be used in this application. Web page updates the visual indicator for the LED based on the received state information. On receiving the toggle request, the Raspberry Pi toggles the state of the LED and sends a response back to the web page with the current state. When the TOGGLE button is clicked, the webpage sends a Toggle request message to the device via ‘gpio-raspberry-control’ channel. Receives response with the current state of the device.Sends a request message to toggle the state of the device.This is a very simple web page with a visual indicator for the device and a button to toggle the on/off state of LED.īehind the scenes, we have the PubNub Javascript API that performs two operations upon receiving certain events. The web interface will look something like this: One will be the controller, a basic web application in the form of a web page which can display the current status of device and send control messages to it, and the second one is the actual device simulated as an LED, and controlled via Raspberry Pi. RPi GPIO, GPIO Python library for Raspbian OS.
Raspberry Pi Model B+ (with Raspbian OS).Hardware Requirementsįor this demonstration, we will use the following hardware:
CAYENNE RASPBERRY PI REMOTE DESKTOP WEB BROWSER WONT OPEN FULL
The full code repository is available here. Though this tutorial is simple, the core design pattern can be extended to large scale implementations, where you can trigger multiple devices simultaneously. In this blog post, we’ll build and demonstrate a simple remote configuration application, controlling a device from a web browser. We will build a small IoT simulation using Raspberry Pi and showcase the most common operation, switching on and off a remote device (in this case, Raspberry Pi LEDs). This is otherwise known as remote configuration. Whether it’s a home, an office, or an industrial site, connected devices rely on some form of automation through sensors or machines and need a mechanism to control their operation remotely. One function that makes the Internet of Things the Internet of Things is remote control of devices, being able to trigger action from a remote location.
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